Consumer Redressal

I had booked a consignment containing Wooden Sofa, Wooden Cloth stand, Centered table glass top through GATI vide docket no. 488830717 dated 01/01/2013. We received the consignment and noticed that 1 item (glass centered table top)was damaged and 1 item (Wooden cloth stand) was received short. They were negligent in delivering the consignment; and therefore caused financial loss to me for the sum of Rs. 6500 (Rs 4500 for the missing Wooden cloth stand and Rs 2000 for the broken centered table glass) . I had, therefore lodged a Claim on them for the Shortage and Damage sustained to our consignment for an amount of Rs.6500, since the item was lost and damaged in their custody. However, they have replied to me saying that for the lost item (which was brand new, pls refer attached invoice copy for details), they will only provide 25% as the claim value, which is unacceptable. I have got all the relevant documents in support of my claims. I need a 100% claim from them. Please help.